聚苯胺和聚吡咯纳米颗粒的制备及其电化学性能研究

摘要

Nano-polyaniline and nano-polypyrrole were prepared by chemical oxidation at low temperature. Electrochemical capacitor was assembled with the polyaniline and polypyrrole as electrode material. The performance of electrochemical capacitors was investigated by cyclic voltammetry, electrochemical impedance spectroscopy, and galvanostatic charge/discharge tests. The results indicate that polyaniline and polypyrrole synthesized at low temperature condition are granular and each particle sizes are 200 nm and 300 nm; when the current density was 1 mA/cm , the specific capacitance of polyaniline and polypyrrole in aqueous electrolyte (1 mol/L H2SO4) were 480.30 F/g and 205.51 F/g.%采用低温化学氧化法合成了聚苯胺和聚吡咯纳米颗粒,并以聚苯胺和聚吡咯纳米颗粒为电极材料,组装成电化学电容器,利用测试循环伏安、交流阻抗和恒流充放电性能研究两者的电化学性能.结果表明,低温下合成的聚苯胺和聚吡咯呈纳米颗粒堆积状,粒径分别为200,300 nm;当电流密度为1 mA/cm2时,在1 moL/L H2SO4电解液中,聚苯胺比电容达480.30 F/g,聚吡咯比电容达205.51 F/g.